Result: standard mapping
How many DS3s are in an OC-48?
An OC-48 carries 48 DS3s, per Telcordia GR-253.
48
DS3s in an OC-48
Working
OC-48 → 48 × OC-1 (STS-1) → 1 × DS3
- 48 × OC-1 (STS-1) in each OC-48 Telcordia GR-25348 × OC-1 (STS-1). Channelized OC-48 is 48 STS-1s.
- 1 × DS3 in each OC-1 (STS-1) Telcordia GR-253Asynchronous DS3 mapping into the STS-1 synchronous payload envelope.
- 48 OC-1s
- 48 × 1 = 48 DS3s
Leftover capacity
340.992 Mbit/s of each OC-48 line rate (2.488320 Gbit/s) sits outside 48 × 44.736 Mbit/s of DS3 line rate (2.147328 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
By bit rate only
Dividing the line rates gives 55.62, which floors to 55 DS3s by bit rate only. The standard mapping is 48. Use the mapping.